Ramayana
प्रचारं स तु सङ्गृह्य प्रजास्वन्तर्गतः प्रभुः । गुहां प्रविष्टः स्वसुतं शिशुमादाय मारुतः ॥ 7-35-49 ॥
Withdrawing his movement, the lord Maruta entered into the bodies of all creatures and, taking up his own infant son, retreated into a cavern.
english translation